Lock-nut.



PATENTBD APR. 24, 1906.

H. STBINERT & M. SCHIMBLPFBNNIG.

LOCK NUT.

AFPLIOATION FILED JUNE21,1905.

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UNITED STATES PATENT OFFICE.

LOCK-NUT.

Specification of Letters Patent,

Patented April 24, v1906.

Application filed June 21.1905. Serial N- 266,249.

r vent the nut turning upon the bolt.

If it is Be it known that we, HENRY STEINERT and l found necessary, thekey C can be secured .MICHAEL SCHIMELPFENNIG, citizens of the UnitedStates, residing at Tamaqua, county of Schuylkill, and State ofPennsylvania, have invented certain new and useful Improvement in LockNuts, of which the following is a specification.

(ur invention relates to a new and useful improvement in lock-nuts, andhas for its object to provide device by which the nut may be locked uponthe bolt after the same is tightened, so as to prevent any retrogrademovement of the nut upon the bolt by vibration, pressure, or othermeans.

With these ends in view this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claim.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, the constructionand operation will now be described in detail, referring to theaccompanying drawings, forming a part of this specification, in which-Figure I is a side elevation of a bolt and nut with our improved lockingdevice; Fig. 2, a cross-section taken on the line 2 2 of Fig. l 5 Fig.3, a perspective view of the key.

A represents the bolt, the threaded portion of which is cut away for adistance upon each side, so that flattened surfaces A will be formedupon each side of the bolt. B is the nut adapted to be threaded upon thebolt in the usual way with a wrench. In the upper or lower surface ofthis nut is formed an nndercut guideway adapted to receive a key C afterthe nut has been tightened in place. The sides of said key areshouldered, so as to [it the undercut guideway, and said key is alsoslotted in from one end, as represented at (V, so that this key is inthe form of a fork and adapted to straddle the cut-away portion of thebolt, so that the prongs of the key will pass upon each side and comingin close contact with the flattened sides A will preagainst displacementby forming lateral openings through one end of thc Init and also throughthe prongs of the key and passing a Cotter-pin D or the like throughsaid openings, as shown in Fig. 2. Thus it will be seen that we haveprovided a nut-lock which can be easily and quickly applied or removedand will absolutely prevent any retrograde movement of the nut upon thebolt. Of course, if desired, only one side of the bolt need beflattened, or there could be more than two flattened surfaces upon thebolt to provide for a more delicate adjustment of the nut; but for allordinary purposes two flattened surfaces, one upon each side of thebolt, is all that is necessary, for then it is only necessary to turnthe nut around half-way to again secure the key in place.

Of course we do not wish to be limited to the exact construction hereshown, as slight modifications could be made without departing from thespirit of our invention.

Having thus fully described our invention, what we claim as new anduseful is- In combination with a threaded bolt having opposite sidesreduced .intermediate the ends of its threaded portion, a nut adapted tobe threaded on the bolt, a recess extending across one of the faces ofthe nut, the walls of the recess being stepped, a fork adapted to fitwithin the recess, thc walls of the fork being stepped to conform to thesteps of the walls of the recess, said fork embracing the reducedportion of the bolt, and means passing through the nut and the fork tohold the fork against displacement from the recess of the nut.

In testimony whereof we have .hereunto a'llixed our signatures in thepresence of two subscribing witnesses.

HENRY STEIN ERT. HICHAEL SCHIMELPFENNIG.

I/Vitnesses:

IVALTER S. SEnJEns, FRANCIS O. LAMBERT.

